Divisibility Rules and Composite Numbers

This video by Mr. Q is part of a series on FSA mathematics practice test questions. It focuses on determining whether numbers are prime or composite using divisibility rules. The video provides step-by-step guidance on analyzing numbers like 16, 13, 12, 9, and 7, explaining the process of identifying factors and applying divisibility rules. The lesson concludes with a summary of the methods used to determine the nature of these numbers.

Where can you find the FSA mathematics practice test questions?

• In a science journal

• In a mathematics textbook

• At the local library

• On the Florida Department of Education website

What is the main task discussed in the video?

• Understanding calculus concepts

• Solving algebraic equations

• Determining if numbers are prime or composite

• Learning about geometry

What is the first step in determining if 16 is prime or composite?

• Check if it is an even number

• Find all its factors

• Use divisibility rules

• Multiply it by 2

Which divisibility rule helps determine if 16 is composite?

• Divisibility by 5

• Divisibility by 7

• Divisibility by 3

• Divisibility by 2

What makes a number composite?

• Having only one set of factors

• Being an odd number

• Having more than one set of factors

• Being a prime number

What is the rule for divisibility by 2?

• The number must be even

• The number must end in 1 or 3

• The number must be odd

• The number must end in 0 or 5

What is the rule for divisibility by 4?

• The number must be odd

• The last two digits must be divisible by 4

• The number must end in 0 or 5

• The number must be even

What is the rule for divisibility by 6?

• The number must be divisible by both 2 and 3

• The number must end in 0 or 5

• The number must be even

• The number must be odd

What is the rule for divisibility by 8?

• The number must be odd

• The number must be even

• The number must end in 0 or 5

• The last three digits must be divisible by 8

What is the rule for divisibility by 10?

• The number must be odd

• The number must end in 0

• The number must end in 5

• The number must be even